Width-adjustable curtain track

ABSTRACT

A width-adjustable curtain track includes a track assembly and a connection device to link to the track assembly, which, as well as connection device, can be undrawn or folded in the axial direction, to enable a curtain cloth that is attached on the connection device to extended or folded followed the connection device. Owing to the adjustable width function of the track assembly, the invention is applicable to various window frames for adjusting to required widths to further increase the convenience of curtain usage.

BACKGROUND OF THE INVENTION

[0001] (A) Field of Invention

[0002] The present invention relates to a width-adjustable curtain track, particularly to a track assembly and a connection device to link to the track assembly, which, as well as the connection device, can be undrawn or folded in the axial direction, in addition, the track assembly is applicable to various window frames increasing the convenience of curtain usage.

[0003] (B) Description of Prior Art

[0004] Window curtains in modern living houses mainly provide the functions of sunshade and privacy protection. FIG. 1 shows a conventional window curtain 10, which comprises a curtain track 11, a plurality of carriers 12 that are set on the curtain track 11, and a curtain cloth 13 that is hung on the carriers 12 and moved in the axial direction followed the carriers 12 on the curtain track 11 forming the sunshade or folded status.

[0005] Seeing that the curtain track 11 of conventional window curtain is unified, curtain specifications sold on the market are limited for consumer selections, in addition, the window sizes vary, and therefore, it is not easy for a user to find a proper curtain track for use. If there is an installed window frame with unique specification, the curtain track is required to be tailor-made for fitting the window size, moreover, the cost of a tailor-made curtain track is high, which does not meet the economic effect.

[0006] Besides, the curtain cloth 13 connects to the carriers 12 by being hung in holes 15 of the carriers 12 through hooks 14, therefore, when the curtain cloth 13 is installed or dismantled, a plurality of hooks 14 and the holes 15 have to be installed or dismantle, respectively, causing the inconvenience. In the event that the hooks 14 can not be dismantled when the curtain cloth 13 needs to be washed, it is possibly occurred that the curtain cloth 13 is torn or the washer is hurt by the hooks 14.

[0007] In view of the foregoing drawback of conventional draper, the invention mainly aims at providing a width-adjustable curtain track that comprises a track assembly and a connection device to link to the track assembly, which, as well as the connection device, can be undrawn or folded in the axial direction, so that a curtain cloth that is attached on the connection device can be extended or folded followed the connection device to enable the track assembly to be applicable to a variety of window frame specifications increasing the convenience of the curtain usage.

[0008] Another object of the width-adjustable curtain track of the invention is to enable the curtain cloth to be torn off the connection device during the operation of installing or dismantling the curtain cloth.

[0009] To enable a further understanding of the objective, structural features and function of the present invention, the detailed descriptions of the preferred embodiments are followed by the brief descriptions of the drawings below.

BRIEF DESCRIPTION OF THE DRAWINGS

[0010]FIG. 1 is a perspective drawing of a conventional used curtain track and curtain cloth.

[0011]FIG. 2 is a perspective drawing of a width-adjustable curtain track of the invention.

[0012]FIG. 3 is an exploded perspective drawing of a width-adjustable curtain track according to the invention.

[0013]FIG. 4 is a cross-sectional view taken about lines 4-4 according to FIG. 2.

[0014]FIG. 5 is a perspective drawing of a combination of curtain track and curtain cloth according to the invention.

[0015]FIG. 6 is a perspective drawing of an extended curtain track of the invention.

[0016]FIG. 7 is a perspective drawing of a combination of curtain track and curtain cloth according to FIG. 6.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0017] With reference to FIGS. 2-4, the invention proposes a width-adjustable curtain track 20, which comprises a track assembly 21 and a connection device 30. The track assembly 21 has an inner track 22 and an outer track 23, which is set outside the inner track 22, enabling the inner track 22 and the outer track 23 to be undrawn or folded in the axial direction to the required width thereof, so that the curtain composition can be applicable to a variety of window frame specifications. Inside the track assembly 21 sets a plurality of equidistantly arranged locking slices 24 with a cap 25 on each end thereof.

[0018] The connection device 30 comprises two sets of connection components 31; each set of the connection component 31 is formed by the connection of a plurality of connecting joints 32, each of which enables a pivot 33 to be inserted, so that the connecting joints 32 revolve around the pivots 33. Besides, two sets of the connection components 31 are set in the opposite direction for connecting each other, enabling the connecting joints 32 to be crisscross arranged thereof. The invention employs a pivot 34 to be inserted at the intersectional position of each two connecting joints 32, so that the connection device 30 is able to revolve around the pivots 33 and 34.

[0019] Therefore, when the connection device 30 is exerted by a pulling force, a diameter distance D1 between the connecting joints 32 (as shown in FIG. 2) being narrow to a diameter distance D2(as shown in FIG. 6); on the contrary, when the connection device 30 is exerted by a pressure the diameter distance D2 between the connecting joints 32 will restore back to the diameter distance D1. Hence, the connection device 30 can be adjusted to any required width thereof.

[0020] The ends of the connecting joints 32 of the connection device 30 are respectively linked to a plurality of locking slices 24 forming a connection relationship between the connection device 30 and the track assembly 21, therefore, un-drawing or folding the inner and outer tracks 22 and 23 simultaneously affect the connection device 30, which then moves along the axial direction as shown in FIGS. 2 and 6.

[0021] With reference to FIGS. 5 and 6, on the connecting joints 32 sets a silk layer 35 with small hook to enable a pile layer 41 on the back of the curtain cloth 40 to attach to or separate from the connecting joints 32. Therefore, the invention enables the usage convenience of easily installing or dismantling the curtain cloth 40 of the connection device 30. Seeing that the top edge of the curtain cloth 40 is attached on the connection device 30 through creasing the curtain cloth 40, which, therefore, can be stretched out when the connection device 30 is undrawn to fully accommodate itself to track assembly 21 to adjust the width and maintain the consistency of the width, as shown in FIG. 7.

[0022] As shown in FIGS. 2 and 5, one side of the track assembly 21 sets an operating cord component 43, which enables several operating cords 42 to pierce through therein, so that one ends of operating cords 42 hang down outside the operating cord component 43, whereas the other ends of the operating cords 42 connect to a plurality of locking slices 24. The operating cords 42, therefore, form the folded or extended status of the curtain cloth 40.

[0023] To sum up, the curtain track 20 of the invention employs the adjustable width function of the track assembly 21 to enable the curtain cloth 40 to be extended or folded through the adjustable width of the track assembly 21 and the connection device 30, therefore, to increase the convenience of the curtain usage, the track assembly 21 of the invention can be applicable to a variety of window frame specifications adjusting the widths as required.

[0024] It is of course to be understood that the embodiment described herein is merely illustrative of the principles of the invention and that a wide variety of modifications thereto may be effected by persons skilled in the art without departing from the spirit and scope of the invention as set forth in the following claims. 

1. A width-adjustable curtain track, wherein a curtain cloth to be pulled by a plurality of operating cords with different functions, enabling the curtain cloth to form in a folded or extended status; the curtain track comprising: a track assembly with an inner track and an outer track, which is set outside the inner track, so that the inner track and the outer track can be undrawn or folded in an axial direction and are able to adjust to required widths thereof; and a connection device with a plurality of connecting joints link to each others thereof with a revolvable way; in addition, the top of the connecting joints set a mechanism to link to the inner and the outer tracks, when the track assembly adjusts the widths of the inner and the outer tracks, the connection device is simultaneously affected to stretch and or fold the curtain cloth.
 2. The width-adjustable curtain track of claim 1, wherein a plurality of connecting joints are linked to two sets of connection components in the opposite direction and crisscross arranged to each other thereof.
 3. The width-adjustable curtain track of claim 1, wherein the curtain cloth can be torn off from a plurality of connecting joints.
 4. The width-adjustable curtain track of claim 1, wherein the top of the curtain cloth is attached to a plurality of connecting joints through creasing the curtain cloth, which fully accommodate to the width of the track assembly thereby pulling and folding the curtain cloth, in addition, maintain the width consistency between the curtain cloth and the track assembly. 